I believe the correct answer is <span>Every time my brother smiles, he laughs thirty seconds later. My brother just smiled. Therefore, he will laugh in under a minute.
All the other statements are of subjective nature. The claims they make are not verifiable in any way. They can't be regarded as either true or false, nor is there a cause and effect relation between their parts. Only the fourth statement has a form of a syllogism, where the conclusion stems from premises which are presumed to be true.</span>
I believe the correct answer to your question is D. Frequently after.
Uther has no known heirs to the throne
